Dowex 50WX8 Cation Exchange Resin from Mexico
Dowex 50WX8 is a high-capacity strong acid cation resin from polystyrene matrix, ideal for nuclear and pharmaceutical purification. It qualifies under HTS 3914.00.60.00 for ion-exchangers based on heading 3903 polymers in primary bead form, as 'Other'.
Duty Rate — Mexico → United States
13.9%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Include cross-section analysis confirming bead primary form (not sheets/films); certify no plasticizers exceeding definitions
• Pitfall: bulk packaging over 38.1x45.7cm may lose Free (B) under 3921 note if misdeclared
• Track country-of-origin for polymer synthesis